46 Proceedings of the Royat Irish Academy. 



■Localities. — Mahe : Foret Noire, 1000 feet (many specimens, October, 

 1908) ; Cascade, 1000 feet (many specimens, 1908). 



This species is distinctly larger than the preceding, and easily recognizable 

 by structural characters as well as by its coloration. Its mucro is rather 

 like that of 6'. montanus Imms ('12, pp. 105-6, fig. 60), from the eastern 

 Himalaya, but in that species the scale-like appendage is quadrate, whereas 

 in both the Seychelles insects that structure is rounded. This latter character 

 is shown also in the American species G. trilohatus, Schott ('97, pp. 175-8), 

 which has, however— like C. afflnis Folsom ('99 «, pp. 265-6) from Japan — the 

 hairs on the dentes feathered, a condition not found in either of the 

 Seychelles insects, nor apparently in Imms' Indian species. From Eitter's 

 somewhat rough figures ('12, p. 386), his Pterihrypta sulcata from Ceylou 

 must be very closely allied to C. pallidus, the form of the mucro agreeing 

 almost precisely, and the foot-claws apparently differing but slightly, " eine 

 flache Erhebung," according to Eitter's description and figure occupying the 

 place of the sharp basal tooth ; the coloration also, as described by Eitter, is 

 strikingly like that of C. pallidus, so that a comparison of types might 

 establish specific identity between the two forms. 



As no study of the jaws of any member of the Paronellini appears ever 

 to have been made, some account of these structures in Cremastocephalus may 

 be given with advantage (Plate XVIII, figs. 78-81). There is a remarkable 

 general uniformity in these organs throughout most groups of CoUembola. 

 In Cremastocephalus the viandible (fig. 78) is of the usual form, and calls for 

 no special remark. The maxillula (fig. 79 3fxl) has an acute apex at its 

 inner distal corner, and beneath this a small, blunt lobe ; the teeth at the 

 base of the inner margin are somewhat short and strong. In the maxilla 

 (fig. 79) the cardo and stipes are of the usual form ; the galea (fig. 72 (j) has 

 a delicate lobe surrounding its apex, and the palp is very small (fig. 79^), 

 with a strong, straight bristle. The head of the lacinia (figs. 79 I, 80, 81) is 

 almost circular in outline, its three outer teeth (figs. 80, 81 1) hardly 

 projecting beyond the edge of the evenly rounded lamellae, which are 

 supported by series of radially arranged bristles. The tongue (fig. 79 hy) 

 has conspicuous rounded distal lateral lobes and a pair of strong supporting 

 ridges towards the centre; its foot (fig. I'd pd) and the supporting 

 arm (fig. 12 hr.) of the maxillula resemble those of other genera of the 

 Eutomobryidae. 



CYPHODERINI. 



The spring-tails of this tribe are blind, white insects, living in under- 

 arouud or concealed .situations, such as caves, or the nests of ants and 

 termites. Several genera have been described, aud a useful synopsis ot the 



